Improved saw-gumming oe toothing machine



niihfw atwt @fitte Letters vPatent No. 76,147, dated lllercltv 31, 1868;anteda'ted October 1, 186i?.y

Iurnovnn SAW- ecriture on Toornrue MACHINE.y

@In Stiebel: referrer tu im tigen trttcrs zrten't rnhnntirrgrrtt futtige smite.

TO ALL WHOM IT MAY CONGERN:

Bo it lrnown that LABRAHAM BARTJIOLF, of the city, county, and` State ofNewYork, have invented a new and useful Improvement in Saw-Gum'inngor'Toothing Machines, of which the followingis a ful-1, clear, and exactdescription, reference being had tothe accompanyingdrawing, forming partof thisspeeiication, and in'which-- 'Figure l represents o. longitudinalvertical section of a machine constructed' according to :ny-improvement.Figure a rear elevation of thc'same. 'A l Figure 3, a. horizontalsectionl thereof, tak'en'immediat'ely above the table.

Figure 141, a plan of devices adapting the machine to cut circular sans;and

Figure 5, a vertical'section of thesarne.

Similar letters'of reference indicating correspoiiding parte.y

Thisrimprovement, which is applicable to cutting the teeth either instraight, curved, 'tepel-,lori'crcularsnu's, consists, firstly, incombination with a. punch and die, or other suitabley or equivalentdevices for cutting the tceth'in a straight, curved, or taper saw, of anautomatic'graduating feed to the sanglfor the purpose of giving anirregular and' graduated size 6r character tothe teeth of the sawthroughout its length oriportion thereof; also, in a combination ot'devices for facilitating, Without arresting, thegeneral motion of themachine, changing the cutting of the teeth in 'the saw from a regularvto a.; graduating' size or character, or 'vice versa. Furthermore, said.invention consists in' a .combination ot' an automatic feed tocircularpla-tes, and stripper, for cuttingtheteethin circular saws, andcleaiingthem of the cut particles; also, in such connection, or for cuttingteeth in circular saws, of a yielding presser to the sa'wplate toprevent backlash in cutting, without restricting thefeed of the plate.r

-Referring to the accompanying'drawing, A represents the bed or tableof-the machine, B' an upper standard. cast to or erected thereon, and Cthe legsor under portion of the framing. 'On the bed or table A, infront, where the machine is designed'. to cut rip or other sans having'incre or less a' straight character, though they may 'oe `more or lesscurved, tapered, or Vbellied on their cutting edges, is arranged across-hed, D, that has seated upon, for traverse alongY it, a slidingtable, E, on which is secured, say, by a clamping-ban'F, the' saw-plate-represented by red lines in gs. 1- and 3.' This saw-plate has theteeth' cut in it by the joint actiony of an intermittent cross-feed,giving-the sliding table E, with the saw-plate enit, a movement-equal tothe length of a to'oth at a time, and vertical reciprocating punch orcutter, G, loperating in connection with a die, H, the Afeed of thesliding table E being. eie'cted at. intervals, say, 'by ashaft, I,carrying a pinion, a, gearing into a rack, on Vthe bottom of theslidingtable E, and the punch Gr being,reciproeated up and down by its attachment to a' plunger, c, driven by a rod, d, from or by an eccentric on ashaft, J, which may he the driving-shaft ot the machine, and beoperated,bybclt or hand, through pulleyse or f. Tol producean automaticv feed ofthe sliding table E, from the shaft J, there is hung, 'on the hack4 endofthe latter, a slotted disk, g, carrying a slide,'z, adjustable in or'out'from the' centre of the disk, to ,give a xed primary variation tothe throw or feed through a rod, z', pivoted to the slide h ,andconnectedhy a strap or slotted formation, s, of it at its lower end,where may he provided an adjusting-screw, j,',to an arm, c,`pivoted,asvat Z, to a lever, K, of a friction-clutch or drivn'gldcvice, similar,it-may he, 'to that vused. inl other feeding-arrangements, and asapplied to' sewing# machines, the lever-K being loosely hung on` the shft I, and striking at itsback end, in its one stroke, a stop,

L, and carrying atornearits other end a movableshoefm, made to fit overo rlap against afwheel, M, fast to the shaftl, which-Shoals, in the upstroke of the yarm c,'caused, by a, canna, ou, the end of the latter,`.to bear `against the wheel M- so-as to feedorpartially turn saidwheel, the shoe m being relieved from nite in the down stroke of the armk, and the wheel restrained' fourturning back by la stationary shoe, o,while the stop L, accordingly as, in point otltime orpdistancetravelled, the .hacl'end ofthe lever. K-strikes it, determines theextent of feed tc the WheelM, by causing the straps, of the roti to givemore or less lifting action Vonrthef arm k, and consequently more orlessmotion to the shoe Iuthis way it vvillb'e perceived that anautomatic feed is given to the table E, and saw-plate thereon, equal tothe length of a tooth, in each reciprocating action 'of'the punch G.But. as in the ease of rip-saws'. for instance,itiisfrequently necessaryor advisable'tova'ry,

man

in a' regular or irregular manner, t'hc size or pitch of the teeththroughout `the length of the sau-,I not only malte the stop Ladjustable by, say, giving it a screw formation, wliicli,`accordingly asit'is raised or lowered,

' controls, as described, tliofeed, togivc a coarser or finer pitch tothe sawteeth, but also communicate at pleasure a positive motion to saidstop L, by, it may be, a rzitehet-wheel, N, on the head of it, operatedby a spring-borne pawl, P', pivoted to a slide, i', which is connected,in an adjustable manner, to vary its-throw, to abell-cranked lever, Q,working on a fulcrum, as .at p, and driven to actuateA theratchet-wheelN und screw-stop Lby connection, as at q, with thevibrating-lever K, while a spring, t, serres to throw back the slide rund pawlP', Thus, supposing the screw-stop L to be adjusted in thc firstinstance so as to control the lever K, togive a small amount of feed tothe saw-plate, and the pawl P to be in gear with the ratchet-wheelN,then, as each successive ldriving-stroke of the pawl unscrews or raisesthe stop L, so will each .successive feeding-stroke of the wheel Mandfeediug-nuovement of the sawplatebc proportionately increased, thus:giving' a gradually coarser pitch euch successive tooth cut, theadvantage of which in rip-saws will be readily understood. y

I The pawl l?, however, is sc constructed and controlled by its spring,as seen in tig. 3, as that it niay'at any moment, without stopping themachine, be thrown and held by its spring out of gear withthe wheel N,when, till again thrown in gear, the stop L having a stationary.character, the machine will cut teeth of a regular size or pitchgwaerebythe graduating character given tothe sawteeth may either be regular andsuccessive, tooth by tooth, orfin series of several teeth for agivendis-tance, and then of an altered pitch for the next series, and so on,the teethiireach series being progressively cotirs'er, or regular anduniform, accordingly as the stop L isdriven automatically, as described,or set at intervals by hand, to vary the feed. vlhescrewtop L also may-bc so set as tlliat at a certainpoint or distance in the, graduatingfeed established by its rotation, the-paw] P will slip or fly under thewheel Rand thus an automatic stopbe given tothe graduating feed for theremainder ofthe saw. Also, saidjstop L may be provided withan adjustablenut, u, for, as in the case of a series of saws to be madeof similarcharacter' and4 pitch of teeth, determining in an automatic manner thepitch nt'starting lby screwing down the stop L till the nut u strikesthebox through which the stopL works. Furthermore, it is advisable, inorder, without stopping the machine, to varrest thet'eed, ascircumstances may require, A'to so suspend the shaft I as that it maybedropped at its forward end through aY hand-lcver, Y, to throw said'sha-ft or its feed-operating wheeL out of gear with the tablecarryingthesaw-plate.

' A vmachine thus constructed, it will be secu, is not' only capableofbeing instantly changed vto cut any number. of teeth' yto the inch,either of regular or'graduating size, and, while applicable to cuttingvarious kinds` of saws, is prominently advantageonsl in manufacturingripsawsby reason of its graduating facilities, and web# saws, es themachine can be set to stop automatically at any given point required.Also, by an arrangement of means, hrcinoftcrdescribcd, circular saws.- Ky y To vary the angle ofv the'tooth out, orto give .it more or'lesshook, as it were, the punch G, whiolris of ,angular form in itscross-section, is set-so thatitmay be turned in its bolster, to givemnre or less Obliquity' in'V its cut relatively to the toothed edgeofthe sawplate5 and, ia connection withfsuch provision, the dip H, theaperture'in which correspondsv to the shape of the punch,'is also made.capable of being similarly turned and set in its holder, @,sad punchand die occupying concentric positions relatively to each otherinlsuchadjust? ment, and, when adjustedthe die being turned byvthe punchin it, orla'tter bythe formerboth die and punch may be secured byset-screws passing through the punch-holder and diebolster.

l'.l.o adapt the machine to cutting circular saws, the cross-bed D andsliding tableE'are'removed,rand in place thereof abcd, R, carrying a,slide, S, is iittcd on the mainv bed ',ortable A, said slide havingavertical shaftnaon or over which is slipped and to which is secured .thecircul'ausaw plate, the relation ofwhich (shown in red lines) to thepunch and its die is represented in ig. 4. This shaft a carries atoothedwheel, b', which gears into. a wheel, c', thartlhas hung on itsshaft albevel-wheel or pinion, al', made tofgear lwith av'bevel-pinion,,e, on the shaft. I, and byvhi'ch,l through the feeding-devices, ashereinbcfore described, omitting the successive graduation ofthe feedeach toothcut, the saw-platel is rotated or turned the distance of atooth at a time, the pitch being regulated by the adjustable stop L tothe feed, foraction lou the plate of the punch G, op'eratinginconnection withits. die, till the whole circumference of the saw-plateis cut, which plate maybe adjusted to or 'from the punch, and itsdrivin'ggear brought in.' or out of working connection b y suitablyadjusting the slide S.

, Attached to the box of the bolster c, or other suitable part, is anadjustable stripper, T, "which, resting over f the periphery of thesaw-plate iu the vicinity of the punch, serves, in the upstroke et' thelatter, to arrest, lift,

and vibrate the-plate, and to detach any adhering blanks cut out'o'f'theplate in the formationof the teeth. To prevent backlash, or action ofthesaw-plate and its opez'atinggcat` after each successive out, which issoessential'to regularity in forming the teeth, and to give increasedsteadiness to the saw-plate, the bed R has oor.- nected with itanadjustablc spring-presser, U, preferably carrying a. roller atits-outer end, which is arranged -to bear upon the saw-plate over or inclose proximity to the die H. In this way thevmachine is made to cut uwith i'tsratchet-wheel N and pawl P, or the equivale 'theteeth in acircular-saw plate in a regular manner by an automatic feed ofthe plate.

What is here claimed, and desired tobe secured by Letters Patent, isl 1.The combinatiomwith areciprocating punch and suitable die, of anautomatic graduating vfeed to the saw-plate, substantially as specified.y y v 2. In combination with the lever Koi' a-fric'tionsfeed. ordriving-device to the saw-plate, the. adjustable stop nts ofthescdevices', 'for giving at pleasure a graduating 'or'uniform feed tothe'plat'e, essentially as herein set forth.

3. The adjustable automatic feed, constructed and operatingsubstantially asshown and described, iu comhina-'tion wit-hVacircular-saw plate-holder and driving-mechanism, as set forth.

4. The adjustable spring-presser U, combination with a revolvingplate-holder and its driving-mechanism,

for operation in connection Ywith a reciprocating punch, and relatvelyto the die thereof, essentially as shown and described, -for the purposeor purposes specied.

' ABM. BARTHOLF.

Witnesses:

J. W. CooMs,

A. LE CLERC.

